import java.sql.*;

public class Main {
    public static void main(String[] args){
        Connection connection =null;
        PreparedStatement preparedStatement =null;
        ResultSet resultSet =null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");

            String url="jdbc:mysql://127.0.0.1:3306/jdbc?characterEncoding=utf-8";
             connection = DriverManager.getConnection(url, "root", "azzzzzq123");
            if(connection!=null){
                System.out.println("连接成功");
            }

            String sql="select*from user";

            preparedStatement = connection.prepareStatement(sql);

             resultSet = preparedStatement.executeQuery();
            //6.遍历结果
            while (resultSet.next()){
                int id = resultSet.getInt(1);
                String name = resultSet.getString(2);
                String pass = resultSet.getString(3);
                System.out.println(id+"----"+name+"----"+pass);
            }




        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }finally{
            try {
                if(resultSet!=null){
                    resultSet.close();
                }
                if(preparedStatement!=null){
                    preparedStatement.close();
                }
                if(connection!=null){

                } connection.close();

            } catch (SQLException e) {
                throw new RuntimeException(e);
            }

        }
    }


}
